What Medications Cause Gout and How to Avoid It

Several widely prescribed medications raise uric acid levels enough to trigger gout flares or push someone from borderline levels into full-blown disease. Diuretics are the single most common pharmaceutical cause, but low-dose aspirin, certain immunosuppressants, and tuberculosis drugs also make the list. The good news is that for most of these medications, safer alternatives exist or the gout risk can be managed alongside the drug you need. Understanding which pills are the problem, and which ones actually help, puts you in a much stronger position to work with your doctor before a flare ever starts.

Diuretics Are the Biggest Offenders

If one drug class deserves the spotlight in medication-induced gout, it is diuretics. These “water pills” are prescribed to tens of millions of people for high blood pressure and heart failure, and they consistently push uric acid levels upward by making your kidneys reabsorb more urate instead of flushing it out.¹ The effect is not subtle. In a study of hypertensive adults, about one in four people taking thiazide diuretics had elevated uric acid, compared with roughly one in six on other blood pressure drugs.²

Not all diuretics carry the same risk. A large population-based study found that loop diuretics like furosemide roughly tripled the odds of developing gout compared with past use, while thiazide diuretics raised the odds by about 70 percent. Thiazide-like diuretics fell in between. The worst scenario was using a loop and a thiazide together, which was associated with more than four and a half times the risk of gout.³ Potassium-sparing diuretics, by contrast, showed no meaningful increase in gout risk in that same study, which is a useful distinction if your doctor is choosing between options.

This matters because many people take diuretics for decades. The longer you are on one, the more time uric acid has to climb and crystals have to form. If you are on a thiazide for blood pressure and start getting joint pain, the diuretic should be high on the suspect list.

Low-Dose Aspirin and the Paradox of Heart Protection

Here is one that surprises most people: the baby aspirin you take to protect your heart can make gout worse. Low-dose aspirin, typically 81 mg per day, reduces the kidney’s ability to excrete uric acid. A study tracking recurrent gout attacks found that taking 81 mg or less of aspirin on two consecutive days was associated with a 91 percent higher risk of a gout flare compared with no aspirin use.⁴ The risk climbed even higher when aspirin was combined with a high-purine diet or diuretic use.

The tricky part is that millions of people with cardiovascular disease take daily aspirin precisely because it helps prevent heart attacks and strokes. Stopping it to spare your joints could be dangerous. One reassuring finding from that same study was that the increased gout risk from aspirin disappeared when patients were also taking allopurinol, a standard urate-lowering drug.⁴ So the practical answer is not to ditch aspirin unilaterally but to make sure your gout is being actively managed if you need to stay on it. A case report described a patient whose gout remained stubbornly uncontrolled despite strict lifestyle changes and proper medication until aspirin was identified as a contributing factor, at which point the picture changed.⁵

If you are dealing with recurrent gout flares and no one has looked at your aspirin, bring it up. It is one of the most commonly overlooked medication triggers.

Cyclosporine and Other Immunosuppressants

Organ transplant recipients and people with certain autoimmune diseases frequently take cyclosporine, an immunosuppressant that carries a steep gout risk. In one study of renal transplant patients, 84 percent of those on cyclosporine had elevated uric acid, compared with 30 percent of those on azathioprine (a different immunosuppressant). Gout developed in 7 percent of the cyclosporine group and in none of the azathioprine group.⁶ That is a dramatic difference between two drugs used for largely the same purpose.

The mechanism appears to be decreased renal clearance of urate. Research in pediatric transplant patients showed that cyclosporine’s effect on uric acid correlates with the dose and involves increased reabsorption of urate in the kidney’s proximal tubule.⁷ This is a distinct mechanism from what diuretics do, but the result is the same: urate backs up in the blood.

For transplant patients, switching immunosuppressants is not always an option since cyclosporine may be keeping the organ alive. The approach here is usually to add a urate-lowering therapy rather than to remove cyclosporine. But clinicians should be aware that gout management in these patients can be complicated by the immunosuppression itself, which limits the use of certain anti-inflammatory drugs.

Tuberculosis Treatment and Pyrazinamide

Pyrazinamide is a cornerstone of standard tuberculosis therapy, and it is well known to cause significant spikes in uric acid. The drug interferes with urate excretion in the kidneys, and the resulting hyperuricemia can lead to gout, kidney stones, or urate-related kidney damage.⁸ Because tuberculosis treatment typically lasts months, the uric acid elevation is sustained rather than transient.

This is one scenario where the drug is essentially non-negotiable. Pyrazinamide is part of the first-line regimen for a disease that kills over a million people a year, so no one is going to drop it because of joint pain. The practical response is monitoring uric acid levels during TB treatment and managing gout symptoms if they appear, usually with colchicine or anti-inflammatory drugs rather than altering the TB regimen.

Chemotherapy and Tumor Lysis Syndrome

Cancer chemotherapy can cause a rapid and extreme surge in uric acid through a process called tumor lysis syndrome. When chemotherapy destroys a large volume of cancer cells at once, the contents of those cells flood the bloodstream, releasing purines that the body converts to uric acid. The result is sudden hyperuricemia alongside dangerous shifts in potassium, phosphorus, and calcium.⁹

Tumor lysis syndrome is most common with blood cancers like leukemia and lymphoma, where chemotherapy can kill enormous numbers of cells very quickly. Unlike the other medications on this list, the gout risk here is acute rather than chronic. Oncology teams routinely anticipate it and give preventive medication, often allopurinol or rasburicase, before starting high-risk chemotherapy cycles. If you are undergoing cancer treatment and develop sudden, intense joint pain, tumor lysis syndrome should be on the radar even if you have never had gout before.

Medications That Actually Lower Gout Risk

Knowing which drugs cause gout is only half the picture. Some medications actively lower uric acid, and choosing them over alternatives that raise it can make a real difference.

Losartan stands out. It is a blood pressure drug in the same broad class as several others (angiotensin II receptor blockers), but it is the only one in the group that meaningfully lowers uric acid levels. In one head-to-head comparison, losartan reduced serum uric acid from about 538 to 491 micromoles per liter, while irbesartan, another drug from the same class, had no effect at all.¹⁰ A broader analysis estimated that losartan lowers uric acid by roughly 20 to 25 percent through a mechanism that resembles classic uricosuric agents like probenecid. Other drugs in the same family, including valsartan, candesartan, telmisartan, and eprosartan, do not share this property.¹¹ Clinical guidelines specifically recommend adding or switching to losartan for patients who have both hypertension and gout.¹²

Calcium channel blockers, another common group of blood pressure drugs, also have mild uricosuric properties and are considered good alternatives to thiazides in people with gout.¹³ So if your blood pressure currently requires a thiazide and you are battling gout, there are real options to switch to drugs that work for blood pressure without worsening your joints.

SGLT2 Inhibitors and an Unexpected Gout Benefit

A newer class of diabetes and heart failure drugs called SGLT2 inhibitors, including names like empagliflozin, dapagliflozin, and canagliflozin, has turned out to lower uric acid through two pathways at once. These drugs reduce uric acid production while also promoting its excretion in the urine. Across large clinical trials, SGLT2 inhibitors lowered serum uric acid by roughly 0.6 to 1.5 mg/dL and reduced the risk of gout by 30 to 50 percent.¹⁴

This is particularly relevant because many gout patients also have diabetes and heart failure, conditions for which SGLT2 inhibitors are already indicated. If you have overlapping conditions, an SGLT2 inhibitor could pull double or triple duty, managing your blood sugar or heart failure while also keeping uric acid in check. These drugs were originally approved for glucose control, but the urate-lowering effect is increasingly viewed as a genuine clinical bonus rather than a footnote.¹⁵

Why Some People Get Drug-Induced Gout and Others Don’t

Not everyone on a thiazide or low-dose aspirin develops gout, and genetics is a big part of the reason. The gene SLC2A9 encodes a transporter protein that moves urate through the kidney, and variants in this gene are the single most powerful genetic predictor of uric acid levels. In women, SLC2A9 variants account for as much as 3 to 9 percent of the total variation in serum urate, while in men the effect is smaller at about 0.5 to 2 percent.¹⁶ These variants have been linked to gout across diverse populations.

What this means in practice is that a medication like hydrochlorothiazide might nudge one person’s uric acid from 5.0 to 5.8 mg/dL without consequence, while in someone with an unfortunate SLC2A9 variant it pushes them from 6.5 to 7.5 and over the crystallization threshold. The drug is the same; the genetic starting point is different. This helps explain why some people take diuretics for years with no issues while others develop gout within months. If you have a family history of gout, you are likely carrying genetic variants that make any uric-acid-raising medication more dangerous for you, and mentioning that family history to a prescriber is genuinely useful.

Practical Steps to Reduce Drug-Induced Gout Risk

The evidence points to several concrete strategies for people who are on or about to start a medication known to raise uric acid:

• Ask about alternatives: If you need a blood pressure drug, losartan or a calcium channel blocker may achieve the same goal without raising uric acid. When a diuretic is unavoidable, potassium-sparing options carry far less gout risk than thiazides or loop diuretics.
• Monitor uric acid levels: A simple blood test before and a few weeks after starting a new medication can catch a rising trend early, before crystals form.
• Consider prophylaxis: If you cannot stop the offending drug, low-dose colchicine (0.5 mg once or twice daily) or a low-dose anti-inflammatory like naproxen 250 mg twice daily can help prevent flares when you are starting or adjusting urate-lowering therapy.¹⁷ These can be used for up to six months during the adjustment period.
• Combine strategically: In patients who must remain on both a diuretic and aspirin, adding allopurinol can offset both drugs’ effects on uric acid. The aspirin study mentioned earlier found that concurrent allopurinol use eliminated the extra gout risk from aspirin.
• Assess the full medication list: Drug-induced gout is rarely about one medication in isolation. A person taking a thiazide, low-dose aspirin, and eating a high-purine diet is stacking multiple uric acid drivers. Addressing the combination is more effective than swapping out any single drug.

Supplements and Vitamin C

You might have heard that vitamin C supplements can lower uric acid and prevent gout. The evidence is thin. A Cochrane review looking at dietary supplements for gout found that allopurinol lowered uric acid significantly more than vitamin C did, and the one study on vitamin C did not even assess gout attack rates, joint pain, or tophus regression.¹⁸ Vitamin C has a small uricosuric effect, but it is nowhere near potent enough to counteract a drug that is actively pushing uric acid up. If you are taking a medication that raises uric acid and hoping to offset it with vitamin C tablets, the math does not work. You are better off talking to your doctor about a real urate-lowering therapy or a medication switch.

Cherry extract, fish oil, and various herbal remedies get promoted online for gout, but the Cochrane team found very limited evidence for any of them. Supplements may have a modest supporting role, but they should not be the strategy for someone whose gout is being driven by prescription medications.

When You Cannot Change the Medication

For transplant patients on cyclosporine, cancer patients receiving chemotherapy, or tuberculosis patients taking pyrazinamide, the offending drug is not something you can simply swap or stop. In these situations, managing uric acid becomes a parallel goal alongside the primary treatment. Allopurinol is the most commonly used urate-lowering drug in these scenarios, though dosing may need to be adjusted. Research has suggested that patients on furosemide sometimes require higher allopurinol doses, possibly because the diuretic interferes with certain downstream enzyme pathways, though this hypothesis is not fully confirmed.¹⁹

For acute gout flares that break through during unavoidable therapy, the standard approach is low-dose colchicine or anti-inflammatory drugs. If those are contraindicated, short courses of corticosteroids like prednisone can help.¹⁷ The key point is that having a medication-driven reason for elevated uric acid does not mean you just live with gout flares. There are interventions at every level, from changing the drug, to adding a counterbalancing one, to treating the flares directly when they happen.